patch.c revision 1.22
1 /* $NetBSD: patch.c,v 1.22 2004/12/09 18:06:10 mycroft Exp $ */ 2 3 /* patch - a program to apply diffs to original files 4 * 5 * Copyright 1986, Larry Wall 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following condition 9 * is met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this condition and the following disclaimer. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26 #include <sys/cdefs.h> 27 #ifndef lint 28 __RCSID("$NetBSD: patch.c,v 1.22 2004/12/09 18:06:10 mycroft Exp $"); 29 #endif /* not lint */ 30 31 #include "INTERN.h" 32 #include "common.h" 33 #include "EXTERN.h" 34 #include "version.h" 35 #include "util.h" 36 #include "pch.h" 37 #include "inp.h" 38 #include "backupfile.h" 39 40 #include <stdlib.h> 41 #include <unistd.h> 42 43 /* procedures */ 44 static void reinitialize_almost_everything(void); 45 static char *nextarg(void); 46 static int optcmp(const void *, const void *); 47 static char decode_long_option(char *); 48 static void get_some_switches(void); 49 static LINENUM locate_hunk(LINENUM); 50 static void abort_hunk(void); 51 static void apply_hunk(LINENUM); 52 static void init_output(char *); 53 static void init_reject(char *); 54 static void copy_till(LINENUM); 55 static void spew_output(void); 56 static void dump_line(LINENUM); 57 static bool patch_match(LINENUM, LINENUM, LINENUM); 58 static bool similar(const char *, const char *, size_t); 59 int main(int, char *[]); 60 61 /* TRUE if -E was specified on command line. */ 62 static int remove_empty_files = FALSE; 63 64 /* TRUE if -R was specified on command line. */ 65 static int reverse_flag_specified = FALSE; 66 67 /* Apply a set of diffs as appropriate. */ 68 69 int 70 main(int argc, char *argv[]) 71 { 72 LINENUM where = 0; 73 LINENUM newwhere; 74 LINENUM fuzz; 75 LINENUM mymaxfuzz; 76 int hunk = 0; 77 int failed = 0; 78 int failtotal = 0; 79 int i; 80 81 for (i = 0; i<MAXFILEC; i++) 82 filearg[i] = NULL; 83 84 myuid = getuid(); 85 86 /* Cons up the names of the temporary files. */ 87 { 88 /* Directory for temporary files. */ 89 const char *tmpdir; 90 size_t tmpname_len; 91 92 tmpdir = getenv ("TMPDIR"); 93 if (tmpdir == NULL) { 94 tmpdir = "/tmp"; 95 } 96 tmpname_len = strlen (tmpdir) + 20; 97 98 TMPOUTNAME = xmalloc(tmpname_len); 99 strlcpy(TMPOUTNAME, tmpdir, tmpname_len); 100 strlcat(TMPOUTNAME, "/patchoXXXXXX", tmpname_len); 101 if ((i = mkstemp(TMPOUTNAME)) < 0) 102 pfatal("can't create %s", TMPOUTNAME); 103 Close(i); 104 105 TMPINNAME = xmalloc(tmpname_len); 106 strlcpy(TMPINNAME, tmpdir, tmpname_len); 107 strlcat(TMPINNAME, "/patchiXXXXXX", tmpname_len); 108 if ((i = mkstemp(TMPINNAME)) < 0) 109 pfatal("can't create %s", TMPINNAME); 110 Close(i); 111 112 TMPREJNAME = xmalloc(tmpname_len); 113 strlcpy(TMPREJNAME, tmpdir, tmpname_len); 114 strlcat(TMPREJNAME, "/patchrXXXXXX", tmpname_len); 115 if ((i = mkstemp(TMPREJNAME)) < 0) 116 pfatal("can't create %s", TMPREJNAME); 117 Close(i); 118 119 TMPPATNAME = xmalloc(tmpname_len); 120 strlcpy(TMPPATNAME, tmpdir, tmpname_len); 121 strlcat(TMPPATNAME, "/patchpXXXXXX", tmpname_len); 122 if ((i = mkstemp(TMPPATNAME)) < 0) 123 pfatal("can't create %s", TMPPATNAME); 124 Close(i); 125 } 126 127 { 128 char *v; 129 130 v = getenv ("SIMPLE_BACKUP_SUFFIX"); 131 if (v) 132 simple_backup_suffix = v; 133 else 134 simple_backup_suffix = ORIGEXT; 135 #ifndef NODIR 136 v = getenv ("VERSION_CONTROL"); 137 backup_type = get_version (v); /* OK to pass NULL. */ 138 #endif 139 } 140 141 /* parse switches */ 142 Argc = argc; 143 Argv = argv; 144 get_some_switches(); 145 146 /* make sure we clean up /tmp in case of disaster */ 147 set_signals(0); 148 149 for ( 150 open_patch_file(filearg[1]); 151 there_is_another_patch(); 152 reinitialize_almost_everything() 153 ) { /* for each patch in patch file */ 154 155 if (!skip_rest_of_patch && outname == NULL) 156 outname = xstrdup(filearg[0]); 157 158 /* for ed script just up and do it and exit */ 159 if (diff_type == ED_DIFF) { 160 do_ed_script(); 161 continue; 162 } 163 164 /* initialize the patched file */ 165 if (!skip_rest_of_patch) 166 init_output(TMPOUTNAME); 167 168 /* initialize reject file */ 169 init_reject(TMPREJNAME); 170 171 /* find out where all the lines are */ 172 if (!skip_rest_of_patch) 173 scan_input(filearg[0]); 174 175 /* from here on, open no standard i/o files, because malloc */ 176 /* might misfire and we can't catch it easily */ 177 178 /* apply each hunk of patch */ 179 hunk = 0; 180 failed = 0; 181 while (another_hunk()) { 182 hunk++; 183 fuzz = Nulline; 184 mymaxfuzz = pch_context(); 185 if (maxfuzz < mymaxfuzz) 186 mymaxfuzz = maxfuzz; 187 if (!skip_rest_of_patch) { 188 do { 189 where = locate_hunk(fuzz); 190 if (hunk == 1 && where == Nulline && !force) { 191 /* dwim for reversed patch? */ 192 if (!pch_swap()) { 193 if (fuzz == Nulline) 194 say( 195 "Not enough memory to try swapped hunk! Assuming unswapped.\n"); 196 continue; 197 } 198 reverse = !reverse; 199 where = locate_hunk(fuzz); /* try again */ 200 if (where == Nulline) { /* didn't find it swapped */ 201 if (!pch_swap()) /* put it back to normal */ 202 fatal("lost hunk on alloc error!\n"); 203 reverse = !reverse; 204 } 205 else if (noreverse) { 206 if (!pch_swap()) /* put it back to normal */ 207 fatal("lost hunk on alloc error!\n"); 208 reverse = !reverse; 209 say( 210 "Ignoring previously applied (or reversed) patch.\n"); 211 skip_rest_of_patch = TRUE; 212 } 213 else if (batch) { 214 if (verbose) 215 say( 216 "%seversed (or previously applied) patch detected! %s -R.", 217 reverse ? "R" : "Unr", 218 reverse ? "Assuming" : "Ignoring"); 219 } 220 else { 221 ask( 222 "%seversed (or previously applied) patch detected! %s -R? [y] ", 223 reverse ? "R" : "Unr", 224 reverse ? "Assume" : "Ignore"); 225 if (*buf == 'n') { 226 ask("Apply anyway? [n] "); 227 if (*buf != 'y') 228 skip_rest_of_patch = TRUE; 229 where = Nulline; 230 reverse = !reverse; 231 if (!pch_swap()) /* put it back to normal */ 232 fatal("lost hunk on alloc error!\n"); 233 } 234 } 235 } 236 } while (!skip_rest_of_patch && where == Nulline && 237 ++fuzz <= mymaxfuzz); 238 239 if (skip_rest_of_patch) { /* just got decided */ 240 Fclose(ofp); 241 ofp = NULL; 242 } 243 } 244 245 newwhere = pch_newfirst() + last_offset; 246 if (skip_rest_of_patch) { 247 abort_hunk(); 248 failed++; 249 if (verbose) 250 say("Hunk #%d ignored at %d.\n", hunk, newwhere); 251 } 252 else if (where == Nulline) { 253 abort_hunk(); 254 failed++; 255 if (verbose) 256 say("Hunk #%d failed at %d.\n", hunk, newwhere); 257 } 258 else { 259 apply_hunk(where); 260 if (verbose) { 261 say("Hunk #%d succeeded at %d", hunk, newwhere); 262 if (fuzz) 263 say(" with fuzz %d", fuzz); 264 if (last_offset) 265 say(" (offset %d line%s)", 266 last_offset, last_offset==1?"":"s"); 267 say(".\n"); 268 } 269 } 270 } 271 272 assert(hunk); 273 274 /* finish spewing out the new file */ 275 if (!skip_rest_of_patch) 276 spew_output(); 277 278 /* and put the output where desired */ 279 ignore_signals(); 280 if (!skip_rest_of_patch) { 281 struct stat statbuf; 282 char *realout = outname; 283 284 if (move_file(TMPOUTNAME, outname) < 0) { 285 toutkeep = TRUE; 286 realout = TMPOUTNAME; 287 chmod(TMPOUTNAME, filemode); 288 } 289 else 290 chmod(outname, filemode); 291 292 if (remove_empty_files && stat(realout, &statbuf) == 0 293 && statbuf.st_size == 0) { 294 if (verbose) 295 say("Removing %s (empty after patching).\n", realout); 296 while (unlink(realout) >= 0) ; /* while is for Eunice. */ 297 } 298 } 299 Fclose(rejfp); 300 rejfp = NULL; 301 if (failed) { 302 failtotal += failed; 303 if (outname != NULL) { 304 if (!*rejname) { 305 strlcpy(rejname, outname, sizeof(rejname)); 306 strlcat(rejname, REJEXT, sizeof(rejname)); 307 } 308 if (skip_rest_of_patch) 309 say("%d out of %d hunks ignored" 310 "--saving rejects to %s\n", 311 failed, hunk, rejname); 312 else 313 say("%d out of %d hunks failed" 314 "--saving rejects to %s\n", 315 failed, hunk, rejname); 316 if (move_file(TMPREJNAME, rejname) < 0) 317 trejkeep = TRUE; 318 } else 319 say("%d out of %d hunks ignored\n", failed, hunk); 320 } 321 set_signals(1); 322 } 323 my_exit(failtotal); 324 /* NOTREACHED */ 325 } 326 327 /* Prepare to find the next patch to do in the patch file. */ 328 329 static void 330 reinitialize_almost_everything(void) 331 { 332 re_patch(); 333 re_input(); 334 335 input_lines = 0; 336 last_frozen_line = 0; 337 338 filec = 0; 339 if (filearg[0] != NULL) { 340 free(filearg[0]); 341 filearg[0] = NULL; 342 } 343 344 if (outname != NULL) { 345 free(outname); 346 outname = NULL; 347 } 348 349 last_offset = 0; 350 351 diff_type = 0; 352 353 if (revision != NULL) { 354 free(revision); 355 revision = NULL; 356 } 357 358 reverse = reverse_flag_specified; 359 skip_rest_of_patch = FALSE; 360 361 get_some_switches(); 362 363 if (filec >= 2) 364 fatal("you may not change to a different patch file\n"); 365 } 366 367 static char * 368 nextarg(void) 369 { 370 if (!--Argc) 371 fatal("missing argument after `%s'\n", *Argv); 372 return *++Argv; 373 } 374 375 /* Module for handling of long options. */ 376 377 struct option { 378 const char *long_opt; 379 char short_opt; 380 }; 381 382 static int 383 optcmp(const void *va, const void *vb) 384 { 385 const struct option *a = va, *b = vb; 386 return strcmp (a->long_opt, b->long_opt); 387 } 388 389 /* Decode Long options beginning with "--" to their short equivalents. */ 390 391 static char 392 decode_long_option(char *opt) 393 { 394 /* 395 * This table must be sorted on the first field. We also decode 396 * unimplemented options as those will probably be dealt with 397 * later, anyhow. 398 */ 399 static struct option options[] = { 400 { "batch", 't' }, 401 { "check", 'C' }, 402 { "context", 'c' }, 403 { "debug", 'x' }, 404 { "directory", 'd' }, 405 { "ed", 'e' }, 406 { "force", 'f' }, 407 { "forward", 'N' }, 408 { "fuzz", 'F' }, 409 { "ifdef", 'D' }, 410 { "ignore-whitespace", 'l' }, 411 { "normal", 'n' }, 412 { "output", 'o' }, 413 { "patchfile", 'i' }, 414 { "prefix", 'B' }, 415 { "quiet", 's' }, 416 { "reject-file", 'r' }, 417 { "remove-empty-files", 'E' }, 418 { "reverse", 'R' }, 419 { "silent", 's' }, 420 { "skip", 'S' }, 421 { "strip", 'p' }, 422 { "suffix", 'b' }, 423 { "unified", 'u' }, 424 { "version", 'v' }, 425 { "version-control", 'V' }, 426 }; 427 struct option key, *found; 428 429 key.long_opt = opt; 430 found = bsearch(&key, options, 431 sizeof(options) / sizeof(options[0]), sizeof(options[0]), optcmp); 432 433 return found ? found->short_opt : '\0'; 434 } 435 436 /* Process switches and filenames up to next '+' or end of list. */ 437 438 static void 439 get_some_switches(void) 440 { 441 char *s; 442 443 rejname[0] = '\0'; 444 if (!Argc) 445 return; 446 for (Argc--,Argv++; Argc; Argc--,Argv++) { 447 s = Argv[0]; 448 if (strEQ(s, "+")) { 449 return; /* + will be skipped by for loop */ 450 } 451 if (*s != '-' || !s[1]) { 452 if (filec == MAXFILEC) 453 fatal("too many file arguments\n"); 454 if (filec == 1 && filearg[filec] != NULL) 455 fatal("-i option and patchfile argument are mutually\ 456 exclusive\n"); 457 filearg[filec++] = xstrdup(s); 458 } 459 else { 460 char opt; 461 462 if (*(s + 1) == '-') { 463 opt = decode_long_option(s + 2); 464 s = ""; 465 } 466 else 467 opt = *++s; 468 469 do { 470 switch (opt) { 471 case 'b': 472 simple_backup_suffix = xstrdup(nextarg()); 473 break; 474 case 'B': 475 origprae = xstrdup(nextarg()); 476 break; 477 case 'c': 478 diff_type = CONTEXT_DIFF; 479 break; 480 case 'd': 481 if (!*++s) 482 s = nextarg(); 483 if (chdir(s) < 0) 484 pfatal("can't cd to %s", s); 485 s = ""; 486 break; 487 case 'D': 488 do_defines = TRUE; 489 if (!*++s) 490 s = nextarg(); 491 if (!isalpha((unsigned char)*s) && '_' != *s) 492 fatal("argument to -D is not an identifier\n"); 493 snprintf(if_defined, sizeof(if_defined), "#ifdef %s\n", s); 494 snprintf(not_defined, sizeof(not_defined), "#ifndef %s\n", s); 495 snprintf(end_defined, sizeof(end_defined), 496 "#endif /* %s */\n", s); 497 s = ""; 498 break; 499 case 'e': 500 diff_type = ED_DIFF; 501 break; 502 case 'E': 503 remove_empty_files = TRUE; 504 break; 505 case 'f': 506 force = TRUE; 507 break; 508 case 'F': 509 if (*++s == '=') 510 s++; 511 maxfuzz = atoi(s); 512 s = ""; 513 break; 514 case 'i': 515 if (filearg[1] != NULL) 516 free(filearg[1]); 517 filearg[1] = xstrdup(nextarg()); 518 break; 519 case 'l': 520 canonicalize = TRUE; 521 break; 522 case 'n': 523 diff_type = NORMAL_DIFF; 524 break; 525 case 'N': 526 noreverse = TRUE; 527 break; 528 case 'o': 529 outname = xstrdup(nextarg()); 530 break; 531 case 'p': 532 if (*++s == '=') 533 s++; 534 strippath = atoi(s); 535 s = ""; 536 break; 537 case 'r': 538 strlcpy(rejname, nextarg(), sizeof(rejname)); 539 break; 540 case 'R': 541 reverse = TRUE; 542 reverse_flag_specified = TRUE; 543 break; 544 case 's': 545 verbose = FALSE; 546 break; 547 case 'S': 548 skip_rest_of_patch = TRUE; 549 break; 550 case 't': 551 batch = TRUE; 552 break; 553 case 'u': 554 diff_type = UNI_DIFF; 555 break; 556 case 'v': 557 version(); 558 break; 559 case 'V': 560 #ifndef NODIR 561 backup_type = get_version (nextarg ()); 562 #endif 563 break; 564 #ifdef DEBUGGING 565 case 'x': 566 debug = atoi(s+1); 567 s = ""; 568 break; 569 #endif 570 default: 571 fprintf(stderr, "patch: unrecognized option `%s'\n", 572 Argv[0]); 573 fprintf(stderr, "\ 574 Usage: patch [options] [origfile [patchfile]] [+ [options] [origfile]]...\n\ 575 Options:\n\ 576 [-ceEflnNRsStuv] [-b backup-ext] [-B backup-prefix] [-d directory]\n\ 577 [-D symbol] [-Fmax-fuzz] [-o out-file] [-p[strip-count]]\n\ 578 [-r rej-name] [-V {numbered,existing,simple}]\n"); 579 my_exit(1); 580 } 581 opt = *s ? *++s : '\0'; 582 } while (opt != '\0'); 583 } 584 } 585 } 586 587 /* Attempt to find the right place to apply this hunk of patch. */ 588 589 static LINENUM 590 locate_hunk(LINENUM fuzz) 591 { 592 LINENUM first_guess = pch_first() + last_offset; 593 LINENUM offset; 594 LINENUM pat_lines = pch_ptrn_lines(); 595 LINENUM max_pos_offset = input_lines - first_guess 596 - pat_lines + 1; 597 LINENUM max_neg_offset = first_guess - last_frozen_line - 1 598 + pch_context(); 599 600 if (!pat_lines) /* null range matches always */ 601 return first_guess; 602 if (max_neg_offset >= first_guess) /* do not try lines < 0 */ 603 max_neg_offset = first_guess - 1; 604 if (first_guess <= input_lines && patch_match(first_guess, Nulline, fuzz)) 605 return first_guess; 606 for (offset = 1; ; offset++) { 607 bool check_after = (offset <= max_pos_offset); 608 bool check_before = (offset <= max_neg_offset); 609 610 if (check_after && patch_match(first_guess, offset, fuzz)) { 611 #ifdef DEBUGGING 612 if (debug & 1) 613 say("Offset changing from %d to %d\n", last_offset, offset); 614 #endif 615 last_offset = offset; 616 return first_guess+offset; 617 } 618 else if (check_before && patch_match(first_guess, -offset, fuzz)) { 619 #ifdef DEBUGGING 620 if (debug & 1) 621 say("Offset changing from %d to %d\n", last_offset, -offset); 622 #endif 623 last_offset = -offset; 624 return first_guess-offset; 625 } 626 else if (!check_before && !check_after) 627 return Nulline; 628 } 629 } 630 631 /* We did not find the pattern, dump out the hunk so they can handle it. */ 632 633 static void 634 abort_hunk(void) 635 { 636 LINENUM i; 637 LINENUM pat_end = pch_end(); 638 /* add in last_offset to guess the same as the previous successful hunk */ 639 LINENUM oldfirst = pch_first() + last_offset; 640 LINENUM newfirst = pch_newfirst() + last_offset; 641 LINENUM oldlast = oldfirst + pch_ptrn_lines() - 1; 642 LINENUM newlast = newfirst + pch_repl_lines() - 1; 643 const char *stars = (diff_type >= NEW_CONTEXT_DIFF ? " ****" : ""); 644 const char *minuses = (diff_type >= NEW_CONTEXT_DIFF ? " ----" : " -----"); 645 646 fprintf(rejfp, "***************\n"); 647 for (i=0; i<=pat_end; i++) { 648 switch (pch_char(i)) { 649 case '*': 650 if (oldlast < oldfirst) 651 fprintf(rejfp, "*** 0%s\n", stars); 652 else if (oldlast == oldfirst) 653 fprintf(rejfp, "*** %d%s\n", oldfirst, stars); 654 else 655 fprintf(rejfp, "*** %d,%d%s\n", oldfirst, oldlast, stars); 656 break; 657 case '=': 658 if (newlast < newfirst) 659 fprintf(rejfp, "--- 0%s\n", minuses); 660 else if (newlast == newfirst) 661 fprintf(rejfp, "--- %d%s\n", newfirst, minuses); 662 else 663 fprintf(rejfp, "--- %d,%d%s\n", newfirst, newlast, minuses); 664 break; 665 case '\n': 666 fprintf(rejfp, "%s", pfetch(i)); 667 break; 668 case ' ': case '-': case '+': case '!': 669 fprintf(rejfp, "%c %s", pch_char(i), pfetch(i)); 670 break; 671 default: 672 fatal("fatal internal error in abort_hunk\n"); 673 } 674 } 675 } 676 677 /* We found where to apply it (we hope), so do it. */ 678 679 static void 680 apply_hunk(LINENUM where) 681 { 682 LINENUM old = 1; 683 LINENUM lastline = pch_ptrn_lines(); 684 LINENUM new = lastline+1; 685 #define OUTSIDE 0 686 #define IN_IFNDEF 1 687 #define IN_IFDEF 2 688 #define IN_ELSE 3 689 int def_state = OUTSIDE; 690 bool R_do_defines = do_defines; 691 LINENUM pat_end = pch_end(); 692 693 where--; 694 while (pch_char(new) == '=' || pch_char(new) == '\n') 695 new++; 696 697 while (old <= lastline) { 698 if (pch_char(old) == '-') { 699 copy_till(where + old - 1); 700 if (R_do_defines) { 701 if (def_state == OUTSIDE) { 702 fputs(not_defined, ofp); 703 def_state = IN_IFNDEF; 704 } 705 else if (def_state == IN_IFDEF) { 706 fputs(else_defined, ofp); 707 def_state = IN_ELSE; 708 } 709 fputs(pfetch(old), ofp); 710 } 711 last_frozen_line++; 712 old++; 713 } 714 else if (new > pat_end) { 715 break; 716 } 717 else if (pch_char(new) == '+') { 718 copy_till(where + old - 1); 719 if (R_do_defines) { 720 if (def_state == IN_IFNDEF) { 721 fputs(else_defined, ofp); 722 def_state = IN_ELSE; 723 } 724 else if (def_state == OUTSIDE) { 725 fputs(if_defined, ofp); 726 def_state = IN_IFDEF; 727 } 728 } 729 fputs(pfetch(new), ofp); 730 new++; 731 } 732 else if (pch_char(new) != pch_char(old)) { 733 say("Out-of-sync patch, lines %d,%d--mangled text or line numbers, maybe?\n", 734 pch_hunk_beg() + old, 735 pch_hunk_beg() + new); 736 #ifdef DEBUGGING 737 say("oldchar = '%c', newchar = '%c'\n", 738 pch_char(old), pch_char(new)); 739 #endif 740 my_exit(1); 741 } 742 else if (pch_char(new) == '!') { 743 copy_till(where + old - 1); 744 if (R_do_defines) { 745 fputs(not_defined, ofp); 746 def_state = IN_IFNDEF; 747 } 748 while (pch_char(old) == '!') { 749 if (R_do_defines) { 750 fputs(pfetch(old), ofp); 751 } 752 last_frozen_line++; 753 old++; 754 } 755 if (R_do_defines) { 756 fputs(else_defined, ofp); 757 def_state = IN_ELSE; 758 } 759 while (pch_char(new) == '!') { 760 fputs(pfetch(new), ofp); 761 new++; 762 } 763 } 764 else { 765 assert(pch_char(new) == ' '); 766 old++; 767 new++; 768 if (R_do_defines && def_state != OUTSIDE) { 769 fputs(end_defined, ofp); 770 def_state = OUTSIDE; 771 } 772 } 773 } 774 if (new <= pat_end && pch_char(new) == '+') { 775 copy_till(where + old - 1); 776 if (R_do_defines) { 777 if (def_state == OUTSIDE) { 778 fputs(if_defined, ofp); 779 def_state = IN_IFDEF; 780 } 781 else if (def_state == IN_IFNDEF) { 782 fputs(else_defined, ofp); 783 def_state = IN_ELSE; 784 } 785 } 786 while (new <= pat_end && pch_char(new) == '+') { 787 fputs(pfetch(new), ofp); 788 new++; 789 } 790 } 791 if (R_do_defines && def_state != OUTSIDE) { 792 fputs(end_defined, ofp); 793 } 794 } 795 796 /* Open the new file. */ 797 798 static void 799 init_output(char *name) 800 { 801 ofp = fopen(name, "w"); 802 if (ofp == NULL) 803 pfatal("can't create %s", name); 804 } 805 806 /* Open a file to put hunks we can't locate. */ 807 808 static void 809 init_reject(char *name) 810 { 811 rejfp = fopen(name, "w"); 812 if (rejfp == NULL) 813 pfatal("can't create %s", name); 814 } 815 816 /* Copy input file to output, up to wherever hunk is to be applied. */ 817 818 static void 819 copy_till(LINENUM lastline) 820 { 821 LINENUM R_last_frozen_line = last_frozen_line; 822 823 if (R_last_frozen_line > lastline) 824 fatal("misordered hunks! output would be garbled\n"); 825 while (R_last_frozen_line < lastline) { 826 dump_line(++R_last_frozen_line); 827 } 828 last_frozen_line = R_last_frozen_line; 829 } 830 831 /* Finish copying the input file to the output file. */ 832 833 static void 834 spew_output(void) 835 { 836 #ifdef DEBUGGING 837 if (debug & 256) 838 say("il=%d lfl=%d\n",input_lines,last_frozen_line); 839 #endif 840 if (input_lines) 841 copy_till(input_lines); /* dump remainder of file */ 842 Fclose(ofp); 843 ofp = NULL; 844 } 845 846 /* Copy one line from input to output. */ 847 848 static void 849 dump_line(LINENUM line) 850 { 851 const char *s; 852 char R_newline = '\n'; 853 854 /* Note: string is not null terminated. */ 855 for (s=ifetch(line); putc(*s, ofp) != R_newline; s++) ; 856 } 857 858 /* Does the patch pattern match at line base+offset? */ 859 860 static bool 861 patch_match(LINENUM base, LINENUM offset, LINENUM fuzz) 862 { 863 LINENUM pline = 1 + fuzz; 864 LINENUM iline; 865 LINENUM pat_lines = pch_ptrn_lines() - fuzz; 866 867 for (iline=base+offset+fuzz; pline <= pat_lines; pline++,iline++) { 868 if (canonicalize) { 869 if (!similar(ifetch(iline), 870 pfetch(pline), 871 pch_line_len(pline) )) 872 return FALSE; 873 } 874 else if (strnNE(ifetch(iline), 875 pfetch(pline), 876 pch_line_len(pline) )) 877 return FALSE; 878 } 879 return TRUE; 880 } 881 882 /* Do two lines match with canonicalized white space? */ 883 884 static bool 885 similar(const char *a, const char *b, size_t len) 886 { 887 while (len) { 888 if (isspace((unsigned char)*b)) {/* whitespace (or \n) to match? */ 889 if (!isspace((unsigned char)*a))/* no corresponding whitespace? */ 890 return FALSE; 891 while (len && isspace((unsigned char)*b) && *b != '\n') 892 b++,len--; /* skip pattern whitespace */ 893 while (isspace((unsigned char)*a) && *a != '\n') 894 a++; /* skip target whitespace */ 895 if (*a == '\n' || *b == '\n') 896 return (*a == *b); /* should end in sync */ 897 } 898 else if (*a++ != *b++) /* match non-whitespace chars */ 899 return FALSE; 900 else 901 len--; /* probably not necessary */ 902 } 903 return TRUE; /* actually, this is not reached */ 904 /* since there is always a \n */ 905 } 906 907 /* Exit with cleanup. */ 908 909 void 910 my_exit(int status) 911 { 912 Unlink(TMPINNAME); 913 if (!toutkeep) { 914 Unlink(TMPOUTNAME); 915 } 916 if (!trejkeep) { 917 Unlink(TMPREJNAME); 918 } 919 Unlink(TMPPATNAME); 920 exit(status); 921 } 922
Indexes created Wed Sep 24 05:09:52 GMT 2025